Office



' June 4, 1929. l C, H EDWARDS ET AL 1,715,540

PUMP

Filed Nov. l0, 1926 2 Sheets-Sheet l A TTORN YS.

June 4, 1929.' c. H. EDWARDS ET AL 1,715,540

PUMP

Filed NOV. l0, 1926 2 Sheets-Sheet 2- ATTORNEYS.

as gasoline.

Patented .lune 4, 'i929w CURTIS H. EDW'ARDS AND RBERT L. TRANSTROM, 0F LGS ANGELES CALIFORNA, ASSIGNOR TO THE BOYLE-DAYTON C0., 0F LOS NGELES, CALIFORNIA, A CGR* rona'rron or eamroanra.

PUMl.

Application led November 10,1926. Serialy No. 147,473.

This invention relates to improvements in pumps, and particularly that class oi pumps to be utilized in the dispenfnm,r of liquids such ln particular the invention has for an ohject the provision of a novel means whereby liquid suc-h as gasoline may be readily drained from the pump when it becomes necessary to do so tor any cause, such as a lire. rlFhe draining oi the pump may be very rapidly accomplished and from a position remote from the pump, so that hazard to the person etlieetingg` such drainin is minimized.

ln practicing one en'ibodin'ient of the invention we may provide any number of dispensing' pumps with an air line ior operating the drain valves therefor, or we may, when considering other embodiments ot the invention operate the drain valves by mechanical means. Each drain valve is associated with an overiiow pipe so that dual piping is unnecessary.

The invention has ior further objects the provision off a novel draining); system 'for pumps which is superior in point of relative simplicity and inexpensiveness, taken .in conliunction with utility, durability and general serviceability.

With the above and other objects in view, the invention consists in the novel and useful provision, formation, construction, association and inter-relation oi parts, members and features, all as shown in certain embodiments in the accompanying drawings, described generally and more particularly'pointed out in the claims. Y v

In the drawings:

Figure 1 is an elevational view showing a general arrangement of an operating house and pump members;

Figure 2 is a 'fragmentary sectional view of one of the pumps and showing details of construction; n

Figure 2a is a detail sectional view taken on line 22a- Q oi' Figure 2, v

Figure 2b is a detail sectional view taken on line 2-2J of Figure 2a.

Figure 3 is a fragmentary partially sectional view of certain details oli' one form of the invention; y

Figure 4 is across sectional view on the line 4--4of Figure 3 and on an enlarged scale `from the, said showing; p

' Figure 5V is an elevation partly in section of a modified form of the invention;

Figure 6 is an elevational view partly in section ot a further modified iol-1n of the invention; i

Figure 7 is an enlarged fragmentary `detail oit' certain portions ot the modified form of the inventionshown in Fig. 5; g

Figure 8 is a vertical section of avalve used in illristratimg` the embodiment of the invention shown in'Figure 6. Y

Corresponding` parts in all the figures are designated by the same reference characters. .Referring with particularity to the drawings, that form oit the invention shown `in Figs. 1 to 4 inclusive is designated by A. of which a is a dispensing pump of which there may be a plurality, as shown at 1, 2 and 3, 7), means for controlling the passage of liquid i'i'omthe pump to a suitable container or source of supply and (l, means for controlling operation of the `means b, all of which elements may be utilized in practicing one embodiment of the invention. Each dispensing pump may be of any preferred construetion, that in the showing including),` the usual stand 4, with a visible cylinder 5, within which cylinder isreceived gasoline, which gasoline is dispensed from said cylinder in measured quantities. A pipe 6 carries 'a three-- way tting 7, one opening' of which receives an overdow pipe 6a. A drain pipe 6b communicates with the base 8 of the cylinder and with the other opening oit' the three-way iittin 7. Thus li quid' might be drained through the pipe 6b intothe pipe 6 or from the pipe 6 into the pipe 6. Includ ed within'the length of the pipe 6b is a valve 9 which is operated through the medium of a lever 10. A coil spring 11 associated withthe lever 10 normal-` ly tends to open the said valve 9, so thatliquid may pass through the pipe '6b and into the pipe 6. This valve 9 constitutes a part of the means Z), and as further constituting elements of the said means is a locking' device 12' and means 13 fior releasingthe lock. The locking device includes a tubular member 14 having integrally formed at one end a cap l5 provided with an arm 16 and at the opposite end said tubular member carries a' is receive-:l on the periphery oi the part 12 and has the head thereof interposed between a surface of the stand and tho cap 15 ot the tubular member, with the said nut screwthreaded within the :anew-threaded opeuiug 2l. Thus the tubular member 14 is u1a.intained in a given position; that is to say, a major portion et the body extends outwardly vfrom the dispensing pump stand, as shown in Figure 2. This uut is adapted to permit rotation otl the tubular member 14 therein, and said nut carries an inwardly projecting stud or pin 23 having a portion thereof received within the peripheral slot on the tubular member 14.

IVithin the tubular member is a piston 21, which piston carries a stem 21b projecting through openings in the member 15, and said stem is formed with a knuckle for engagement with an end of the lever 10. The opening in the member 15 is comparatively large so that the said stem 21h may have side movement to compensate for swing of the lever 10. A small spring 21c is interposed between the piston head 21 and the member 15, which spring acts as a cushion means.

The release means ttor the lock includes a cylinder 24 within which is a piston 25 having a stem 2G passed 'through a stuffing box 27at one end of the cylinder, and a coil spring 28 is interposed. between the piston 25 and the end 29 of the cylinder. To maintain the interior of the cylinder 24 back of the piston under atmosphericpressure a small opening 30 is placed in the cylinder 24. A tube 31 communicates with the said cylinder and with the air pressure tank d, there being a valve 32 included within said tube 31.

The air pressure tank d is placed within a house 33 which house is preferably located at some zone remote from the dispensing pump a. In the showing of Figure 1 we have shown three of the dispensing pumps, and we may have any number of dispensing pumps, depending upon requirements, all of said pumps having a connection with the air pressure tube or line 31.

The operation of this device as just described is as follows: It we assume that the cylinder 5 is filled with gasoline, and tire breaks out, an operator turns the air valve 32 which would allow air under pressure to enter the cylinder 24 and move the piston 25 inwardly of said cylinder. We have assumed that the parts are in the position shown in Figs. 2 and 4. In this position it will be noted that the valve 9 is closed and that the spring Al1 is under tension. I `urthermore, the member 14 is held in outward position by the pin or key 23 being received in the groove 19. When the air enters the cylinder 24 to actuate the piston 25, the stem 26 will strike the arm 16, which arm it will be remembered is associated with the end 15 of the tubular member 14, and push the said arm upwardly into the dotted line position ot Figure 3. When this occurs the pin 23 will slide within the groove 19 and be received in the groove 18 at which time the spring 11 will be released so that it may swing the arm l() to open the valve 9. lVhen this occurs all liquid within the cylinder 5 will be drained through the pipe (5 and into the pipe (i back to the source ot supply, c. rl`he device would be operated at night when the station is closed. The operator upon desiring to re-fill the cylinders 5 would first pull outwardly upon the tingerpiece 17 to move the tubular member 14 outwardl f and then turn the .tineerniece so that the pin 23 would be received within the slot 19 to lock the said tube 14 against movement and close valve 10.

That form of the device shown in Fig. 5 does not differ in essential details from the form ot the device ust described. However, the device of Fig. 5 is adapted to be operated by mechanical means in place of air pressure. InV particular we have shown as beforer` au operating house or the like /land one or more pumps A conduit 50 communicates with the house 7L and with the base of the pump The reservoir c preferably placed within the ground. In the present instance a cable 51 is passed over sheaves to 57 inclusive, which sheaves are within the conduit 50.

Referring to Figure 7 we have provided the device 12 as betere, and which device is identical with the showing of Figs. 2 and 4. In place of the air-operated lock release 13, we have provided a bell crank arm 58 pivotally carried by the casing or standard 4 and one end of said bell crank carries a sheave 59 and thev opposite end is adjacent the arm 16 and is normally held out of contact with said arm by a coil spring 60. The cable 51 is passed over the sheaves 52 and 53 and upwardly within the first pump and over the sheave 59 and back downwardly and over the sheave 54, and so on for succeeding pumps until the last pump is reached when the cable end is secured to the bell crank arm. The device 12 would be locked in position with the valve closed the same as before, and when it is desired to open the valve 9 the cable 51 is pulled to move the bell crank downwardly s0 that one of the arms of the bell crank 58 would contact with the arm 16 and open the drain valve 9.

The form of the device shown in Figures 6 and 8 is operated by air pressure and the same will be designated as an entirety by m. This valve includes a housing having direct connection with inlet pipes 81 and 81EL whereby liquid may pass through said pipe 81, through the valve housing 80 and pipe 81 without interruption in the flow thereof. Surrounding the said pipe 81a is a second or drain pipe 82 which would communicate with the base of the cylinder and this pipe communicates with a chamber 83 of the valve housing.

A spring-pressed valve 84 closes communication between the chamber 83 of the housing and a chamber 85 which communicates with the pipe 81. An extension 86 is formed on the housing 80 and a stem 87 is passed through said extension and within the chamber 85 of the housing, and likewise outwardly from vthe extension, as shown at 88. A device 13 with cylinder 24 and piston 25 therein similar to the device 13 has the pin 26 thereof adapted to contact with one arm 89y of a bell crank lever 90. The second lever portion 91 of said bell crank is adapted to contact with the stem 87. A coil spring 92 normally urges the stem to an outward posit-ion and against the lever portion 91. When air is admitted intothe line 31 it will actuate the piston 25 to move the stem 26 outwardly and in turn move the bell crank 90, which will force the lever portion 91 against the stem 87 to unseat the valve 84 which will permit any liquid such as gasoline to flow downwardly from the tank through the pipe 82 and into the pipe 81.

It is obvious that various changes and modi ifications `may be made in practicing the invention, in departure from the particular showing of the drawing, without departing from the true spirit of the invention.

Having thus disclosed our invention, we claim and desire to secure by Letters Patent:

1. In a device adapted to permit the draining of liquid from a container, comprising a valved drain, means 'tor locking the valve closed, and release means for the iirst means to permit an opening of said valve; said last named means including an air-operated piston adapted to contact With the lirst named means.

2. In a device adapted to permit the draining of liquid from a container, comprising a valved drain, kmeans for locking the valve closed, and release means for the first means to permit an opening ol said valve; said last named means including anv air-operated piston adapted to contact withthe first named means; and further means spaced in a zone remoteffrom the tank for controlling operation of the second named means. l

3. In a device of the character disclosed, a tank, a valved drain therefor, and means for locking the valve closed; said means comprising a tubular member, a piston associated with the valve and in part received within the tubular member, and means for locking the tubular member relative to the piston to close the valve.

4f. In a device of the character disclosed, a tank, a valved drain therefor, and means for locking the valve open; said means comprising a tubular member, a .piston associated with the valve and in part received within the tubular member, means for locking the tubular member relative to the piston to close the valve, and further means for unlocking said tubular member to open the said valve.

In testimony whereof, we have signed our names to this specification.

comas H. EDWARDS. Bonner L. TRANsTRoM. 

